Earlier quoted context omitted.
If we can afford a $1.5 trillion injection into the markets, then we can afford moving the SS retirement age to 60 where the most vulnerable exist.
The $1.5 trillion injection doesn't actually cost any money. The Fed is making short-term fully-collateralized loans.
The real problem is that if they did this it wouldn't actually have any real short-term effect other than making the things seniors want to buy more expensive. Money's a fiction: it's purpose is to incentivize people to produce things that other people want. If you increase the amount of money in a population but don't increase the supply of goods, it just means everything gets more expensive. You still have the same amount of hospital beds, senior living centers, cruise berths, golf courses, etc. to go around but now the market-clearing price of buying one goes up, some fraction of poor old people end up without one, and their spot is taken by a richer young person.
Over the long-term there's a reallocation of labor that actually does change things: that senior might retire and his job will be filled by someone younger, or people who might've gone into pediatric nursing instead work at a nursing home, or luxury condos might be converted into assisted living. All of these have unintended consequences that ripple down to others, eg. if condos are converted to senior homes it raises the price of housing for young people.